The Son of Svanir are using the jotun leader Korag's obsession for power to lure him into worshipping the ice dragon, Jormag. Jormag exacts a heavy price from his worshippers, however, and many jotuns will be ravaged if Korag isn't turned from his current path.

— In-game description

Echoes of Ages Past is part of the personal story for norncharacters. In this section of the storyline, players travel to the Osenfold Shear to confront Korag, the jotun giant king, who has begun worshiping the ice dragon.

Elder Thruln: From the shadows of memory, I salute you. You are a worthy opponent.

<Character name>: Who are you?

Elder Thruln: I am the elder known as Thruln. I was a giant-king, when the jotun ruled all that we surveyed. My people were proud and strong. Now, I am but an echo of the past.

<Character name>: Your people are in great danger. Korag has begun to worship the ice dragon, a creature that will destroy them.

<Character name>: The ice dragon has already brutalized my people. It will consume and corrupt the last of yours if Korag has his way. Help me stop him.

Elder Thruln: The blood of giant-kings flows in Korag's veins and gives him great power. I cannot stop him, but I can tell you the tale of the giant-kings. Perhaps that will help you save my people from this fate.

Elder Thruln: I will show you the jotun of ages past, when we strode over the world as mighty lords. Witness the savagery, greed, and vanity that ended our glorious rule.

Elder Thruln: Once, we were as gods...

During the replay of the jotun civil war (cinematic):

Elder Thruln: Behold. At the height of our power, arrogance and jealousy led the jotun to civil war.

Elder Thruln: Our blood is the blood of the mountains. In it, there is power. And so we fought...over blood itself.

King Bokar: Vraxes! I shall feast on your beating heart! I am king, and this land is mine!

King Vraxes: You're a pretender, Bokar! Not a king, not a brother. I'll burn this land before I yield it to you.

After seeing the history of the jotun, I took pity on their leader and offered him a chance to discover the truth. If he still serves Jormag when I see him again, I will destroy him.

Eir and Beigarth both agree that I need a way to fight Korag. Eir suggests I seek Wolf's blessing. Beigarth wants blood from the heart of a mighty predator to enrich his new weapon. Either of these should give me the edge I need.